Question and answer
explain effects of soil physical properties on crop production
Crops have been grown in the subhumid and semiarid Argentinean Pampas for over 50 years using tillage methods (intensive plowing) introduced from more humid regions. [ As a result, soil degradation due to erosion by wind and water has been moderate to severe. Experiments to control erosion through use of conservation systems were initiated at six semiarid and subhumid sites in the Argentinean
Pampas between 1976 and 1990 and conducted for 5 to 11 years. In this paper, we summarize the effect of conventional and conservation tillage treatments on some soil properties and crop yields. Most soil physical, chemical, and biological properties were improved by conservation systems, but the rate of change differed due to climatic and soil differences among sites, with the difference due to tillage generally being greater at the more humid sites with loamy soils than at the drier sites with sandier soils. Crops with a large N requirement yielded less with conservation than with conventional tillage systems. Use of conservation tillage can improve or stabilize soil conditions in the region, but crop nutrient requirements must be met to achieve optimum crop yields when conservation tillage is used. Research regarding the plant nutrient requirements under conservation tillage is being conducted. Also, conservation tillage is gaining acceptance in the Argentinean Pampas region. ]
Expert answered|ANGEEELICA|Points 2208|
Question
Asked 3/18/2011 5:14:41 AM
0 Answers/Comments
Ask a question
Not a good answer? Get an answer now. (FREE)
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Home | Contact | Terms | Privacy | Social | ©2013 Purple Inc.
Ad
Popular Conversations
The question below refers to the selection "By the Waters of ...
Weegy: The question below refers to the selection "By the Waters of Babylon." The many lights that John sees in his ...
4/22/2014 8:51:50 AM| 5 Answers
Identify the function of the italicized noun clause. Cousin Jake's ...
Weegy: The function of the noun clause "that he run the mile in less than four minutes" is a NOUN PHRASE COMPLEMENT.
4/22/2014 9:51:58 AM| 4 Answers
Which sentence uses a verb that agrees with its compound subject? ...
Weegy: Which sentence uses a verb that agrees with its compound subject? A. Pumpkins and grapes are grown on vines. ...
4/22/2014 12:24:12 PM| 4 Answers
(x 2 + 4x + 8)(2x - 1)
Weegy: Simplify: 2x - 8 = 2x - 3. As you can see, there are no values of x that make the equation true. Subtracting 2x ...
4/22/2014 7:19:21 AM| 3 Answers
Ethiopians learned Christian traditions from ___________. a. their ...
Weegy: Ethiopians learned Christian traditions from the Hebrews.
4/22/2014 7:36:55 AM| 3 Answers
If x varies inversely with y and x = 4 when y = 9, find x when y = 6. ...
Weegy: (3x-2) squared is 9x^2 - 12x + 4. User: Find the general term for the sequence -3, 1, 5, 9, .... Weegy: -6
4/22/2014 8:28:58 AM| 3 Answers
How many terms are in the expression shown below? x2 - 10xy + 3y + ...
Weegy: There are 5 terms in the expression x2 - 10xy + 3y + y2 - 1. User: Find the value of 21 - 18 ÷ 3 · ...
4/22/2014 1:25:53 PM| 3 Answers
Which of the following represented loyalty to church before loyalty ...
Weegy: D. User: The Glorious Revolution took place in response to the __________. a. actions of James II c. Articles ...
4/22/2014 4:08:32 AM| 2 Answers
At the incident scene, who handles media inquires? A. Public ...
Weegy: At the incident scene, who handles media inquires? D. Communications Officer User: The Liaison Officer: A. ...
4/22/2014 6:09:11 AM| 2 Answers
When should an HIV positive person share his or her status with ...
Weegy: When the person is ready an HIV positive person share his or her status with friends and family.
4/22/2014 6:32:20 AM| 2 Answers
Joe denied being the father of Lisa. Lisa's mom took Joe to court ...
Weegy: Joe denied being the father of Lisa. Lisa's mom took Joe to court to prove he is Lisa's biological father. The ...
4/22/2014 6:37:34 AM| 2 Answers
Weegy Stuff
S
L
P
C
L
P
C
Points 1748 [Total 7135]| Ratings 0| Comments 1748| Invitations 0|Offline
S
L
P
C
P
C
1
L
P
C
Points 1706 [Total 9587]| Ratings 0| Comments 1706| Invitations 0|Offline
S
1
L
C
L
Points 890 [Total 5693]| Ratings 4| Comments 850| Invitations 0|Offline
S
1
L
1
L
P
Points 550 [Total 7227]| Ratings 2| Comments 530| Invitations 0|Offline
S
L
Points 478 [Total 2925]| Ratings 2| Comments 448| Invitations 1|Offline
S
L
1
1
1
Points 271 [Total 3537]| Ratings 7| Comments 201| Invitations 0|Offline
S
R
Points 252 [Total 364]| Ratings 6| Comments 172| Invitations 2|Offline
S
Points 193 [Total 193]| Ratings 6| Comments 113| Invitations 2|Offline
S
Points 170 [Total 586]| Ratings 0| Comments 170| Invitations 0|Offline
S
1
Points 155 [Total 485]| Ratings 3| Comments 125| Invitations 0|Offline